Hey E9XPost,
As the title says, im trying to find out what mods you need for each stage, and what the max boost is per stage. I have been doing some research, and think i may have been using too high of a stage map on my car... Ive been using stage 1 with no mods (downpipes are shipping), with a 16-17 PSI max. Ill be using the 9-10 Aggressive maps for this chart.

It all depends on where in the RPM range you are seeing that boost. Hitting 16 psi down low then quickly tapering to 12-13 towards redline (as I believe the stage 1 maps do) should not be an issue typically. When you say you are hitting 16-17, I am imagining it is peaking at that and not sustaining it through the entire RPM band correct? If you can do a log and post it, it will tell us everything we need to know. I doubt there is anything to be concerned about though.